Uploaded a new version (v0.80.8) that will only potentially affect users of Doitsu's Kindlegen plugin.
Now that it (the Kindlegen plugin) has been modified to accept EPUB3-compliant identifiers in the form of:
Code:
<dc:identifier>urn:AMAZON:BXXXXXXXXX</dc:identifier>
then that is what KindleImport will produce whenever its preference "asin_for_kindlegen_plugin" is set to "true", and "azw3_epub_version" is set to "3" (whenever importing azw3s).